README更新；删除frontend项目

frontend/src/views/AboutView.vue

@@ -1,5 +0,0 @@
-<template>
-  <div class="about">
-    <h1>This is an about page</h1>
-  </div>
-</template>

frontend/src/views/HomeView.vue

@@ -1,21 +0,0 @@
-<template>
-  <div class="home">
-    <div>
-      <el-button type="primary">el-button</el-button>
-      <el-badge value="99" type="primary"></el-badge>
-    </div>
-    <HelloWorld msg="Welcome to Your Vue.js App" />
-  </div>
-</template>
-
-<script>
-// @ is an alias to /src
-import HelloWorld from '@/components/HelloWorld.vue'
-
-export default {
-  name: 'HomeView',
-  components: {
-    HelloWorld
-  }
-}
-</script>

frontend/src/views/NotFound.vue

@@ -1,16 +0,0 @@
-<template>
-  <div class="not-found">
-    404 Not Found
-  </div>
-</template>
-
-<script>
-export default {
-  name: 'NotFound',
-  components: {}
-}
-</script>
-
-<style scoped>
-
-</style>